By Jennifer Warnick and Linda Dahlstrom / Starbucks Newsroom SEATTLE — Barista Loni Stubblefield walked through the lobby of a south Seattle Starbucks addressing each seated customer directly with her broad smile. “Hey, just so you know, we’re going to be starting our training in a few minutes.” Five minutes later, the once-full store had emptied of its customers. One by one, they finished their drinks and packed up to leave – a UPS guy, a man wearing a massive backpack and a bicycle helmet, a woman in headphones working on a laptop. Many of them said goodbye to Starbucks partners as they filed past the sign on the door, which matched the one on the drive-through screen: “We’ll see you tomorrow.” Even after the store was closed, customers continued to arrive. “Aww, those were regulars,” Stubblefield said as two men walked up, read the sign on the door and walked away. Ther...